The Invisible Primary, 3/3

Sarah Palin and Mitt Romney had their late-night duel Tuesday night, with Palin doing stand-up on Leno and Romney on Letterman; Romney's schedule of book-signing dates for the "No Apologies" tour began today; the Dallas Morning News op-ed page saw speculation that Gov. Rick Perry (R) will run for president, after he defeated Sen. Kay Bailey Hutchison in the gubernatorial primary; Mike Pence (along with fellow Rep. Jeb Hensarling) proposed a constitutional amendment to cap federal spending; the Republican National Committee has set a date of August 27 for its 2012 nominating convention, which will be held in either Tampa, Salt Lake City, or Phoenix; and Mike Huckabee endorsed Mike Cox for governor in Michigan.

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Chris Good is a political reporter for ABC News. He was previously an associate editor at The Atlantic and a reporter for The Hill.